326 
KEYS TO THE FERNS OF BORNEO 
a. Pinnae narrower. 
d. Lower pinnae horizontal or 
deflexed 
d*. Pinnae ascending 
Veins anastomosing. 
c. Fronds dimorphous 
ci. Fronds uniform 
ai. Fronds not coriaceous. 
b. Pinnae linear or linear-lanceolate, several, 
entire 
61. Pinnae i to 3, entire 
62. Pinnae more numerous, usually pinnate, 
pinnules broad 
5. S. diver gens. 
6 . S. Walkerae. 
7. S. cor datum. 
8. 5 . coriaceum. 
9. 5 . en si folium. 
10. 5 . Hosei. 
11. S. heterophyllum. 
1. S. jamesonioides (Baker) Copel. 
Kinabalu. 
Celebes. 
2. S. ovatum (J. Sm.) Copel. 
Sarawak (Mt. Matang). 
Philippines, Celebes. 
3. S. induratum (Baker) C. Chr. 
Sarawak, British North Borneo. 
Endemic. 
4. S. FULIGINEUM Copel. 
Sarawak. 
Philippines. 
5. S. divergens (Roxb.) Kuhn. 
Sarawak. 
Malaya. 
6. S. Walkerae (Hooker) Kuhn. 
Dutch Borneo. 
Banca, Sumatra, Ceylon. 
7. S. cordatum Gaud. 
Sarawak. 
Malay Peninsula. 
8. S. coriaceum v. A. v. R. 
Dutch Borneo. 
Endemic. 
